Polish vs eggshell

Polish

noun
  • A breed of chickens with a large crest of feathers. 

  • The language spoken in Poland. 

adj
  • Of, from or native to Poland, or relating to the Polish language. 

eggshell

noun
  • A pale off-white colour, like that of the eggshell. 

  • The shell around an egg. 

adj
  • Very matt, having a low reflexivity, like an eggshell. 

  • Exhibiting the thinness, translucency or near-transparency, and fragility of an eggshell. 

  • Of a pale yellowish-whitish colour, like that of the eggshell. 

How often have the words Polish and eggshell occurred in a corpus of books? (source: Google Ngram Viewer )